The FICA percentage is 15.3% of your gross income, split between you and your employer
FICA (Federal Insurance Contributions Act) taxes fund Social Security and Medicare. The total rate is 15.3%, but you only see half of it on your paycheck. Your employer pays the other half directly to the government without it appearing as a deduction.
Here's how it breaks down: 12.4% goes to Social Security and 2.9% goes to Medicare. If you're self-employed, you pay the full 15.3% yourself because you're both the employee and the employer. If you work for someone else, you pay 7.65% and your employer pays 7.65%.
The Social Security portion has a wage cap — you only pay it on income up to a certain threshold, which changes each year. Medicare has no cap, so you pay 2.9% on all wages no matter how much you earn. High earners pay an additional 0.9% Medicare tax on income above certain amounts.
Key Takeaways
- FICA is 15.3% total: 12.4% for Social Security and 2.9% for Medicare.
- Employees pay 7.65% and employers pay 7.65%, so you only see half the rate on your paycheck.
- Social Security tax stops once you reach the annual wage cap, but Medicare tax continues on all income.
- Self-employed people pay the full 15.3% because they cover both the employee and employer portions.
- High earners pay an extra 0.9% Medicare tax on wages above a threshold set by income level and filing status.
Why the FICA rate is split between you and your employer
The split exists because FICA was designed as a shared responsibility. Congress set it up so that workers and employers each contribute equally to the Social Security and Medicare trust funds. From the government's perspective, both portions are FICA taxes — but from your paycheck perspective, you only feel half the burden.
This matters when you're self-employed or running a business. If you work for yourself, you have to pay both halves, which is why self-employed people often see a much larger tax bill than W-2 employees earning the same income. You can deduct half of your self-employment tax when you file your return, but you still have to pay it upfront.
The Social Security wage cap and why it matters
Social Security tax only applies to wages up to a maximum amount each year. In recent years, this cap has been around $160,000 to $168,600, but it changes annually based on wage growth. Once you earn more than the cap in a calendar year, you stop paying Social Security tax on additional income.
This means high earners pay a smaller percentage of their total income to Social Security than lower earners do. Someone making $50,000 pays Social Security tax on all of it. Someone making $200,000 pays it only on the first $160,000 or so, leaving the remaining $40,000 untaxed for Social Security purposes.
Medicare has no wage cap. You pay 2.9% on every dollar you earn, no matter how much that is. This is why Medicare tax continues to grow as your income grows, while Social Security tax plateaus.
The additional Medicare tax for high earners
If your income exceeds certain thresholds, you pay an extra 0.9% Medicare tax on the amount over the limit. The threshold depends on your filing status: $200,000 for single filers, $250,000 for married filing jointly, and $125,000 for married filing separately.
This additional tax was added in 2013 as part of the Affordable Care Act. It applies to wages, self-employment income, and certain investment income. Your employer withholds it automatically if your wages cross the threshold, but if you have multiple jobs or self-employment income, you may need to account for it when you file your tax return.
How FICA appears on your pay stub
On a typical pay stub, you'll see two line items: Social Security tax and Medicare tax. Social Security usually shows as "OASDI" (Old Age, Survivors, and Disability Insurance) or simply "Social Security." Medicare shows as "Medicare" or "HI" (Hospital Insurance). Together, these are your FICA withholding.
The amount withheld is calculated on your gross pay before other deductions like health insurance or retirement contributions. If you contribute to a traditional 401(k) or IRA, those reduce your taxable income for income tax purposes but not for FICA — you still pay FICA on the full amount.
Your employer's portion doesn't appear on your pay stub at all. It's a separate cost to the business that you never see, but it's part of your total compensation package.
Self-employment and the full FICA rate
If you're self-employed, you pay both the employee and employer portions of FICA, totaling 15.3%. This is called self-employment tax. You calculate it on your net business income (revenue minus business expenses) using Schedule SE when you file your tax return.
Self-employed people often owe a larger tax bill than they expect because they're paying both halves. However, you can deduct half of your self-employment tax as a business expense, which reduces your adjusted gross income. This deduction helps offset some of the burden, but you still pay the full amount upfront.
If you have both W-2 income and self-employment income, you pay FICA on both. The Social Security wage cap applies to your combined income, so if you hit the cap with your W-2 job, you won't pay Social Security tax on self-employment income above that threshold.
What happens if you change jobs mid-year
If you work for multiple employers in the same year, each one withholds Social Security tax up to the wage cap independently. This means you could overpay Social Security tax if your combined income from all jobs exceeds the cap. When you file your tax return, you can claim a credit for the overpayment, and the IRS will refund it.
Medicare tax doesn't have this problem because there's no cap. However, if your combined income triggers the additional 0.9% Medicare tax, you need to account for that when you file. Your employers may not coordinate withholding, so you might owe additional tax or be owed a refund depending on how much was withheld.
Frequently Asked Questions
Why do I pay FICA if I'm already paying income tax?
FICA and income tax are separate systems funding different programs. FICA funds Social Security and Medicare specifically. Income tax funds general government operations. You pay both on wages, and they're calculated independently.
Can I opt out of paying FICA?
No. FICA is mandatory for all W-2 employees and self-employed people. Some religious groups have limited exemptions under specific conditions, but these are rare and require IRS approval. Most workers have no option to avoid FICA taxes.
Does FICA apply to all types of income?
FICA applies to wages and self-employment income. It does not apply to investment income, capital gains, rental income, or most other sources. However, certain types of compensation like bonuses and commissions are subject to FICA just like regular wages.
What if I'm over the Social Security wage cap — do I get that money back?
No. Once you stop paying Social Security tax because you've hit the wage cap, that money is not refunded. However, higher lifetime earnings do increase your Social Security benefit when you retire, so the money isn't wasted — it's just that additional earnings above the cap don't increase your benefit further.
Is the FICA percentage the same every year?
The percentages (12.4% for Social Security and 2.9% for Medicare) have been stable for decades. The Social Security wage cap changes annually based on national wage growth, but the tax rate itself does not change. Congress would have to pass new legislation to alter the FICA percentages.